Lets be perfectly fair here, Resolve has near changed the game for a lot of indie film makers on low to no budget, and i doubt 99% of those have ever even opened a compositing app haha, BMD going after commercial setups with Resolve is more about shifting the hardware, they dont really have this aproach with Fusion, so they restrict its features slightly, which is way beyond fair haha (gift is the word that springs to mind)
Their output hardware for sure, which is not that expensive to begin with. Cheapest on the market
but it's not much, we have to be honest here too.
The Grading Panel is of course nice to sell, but I'd bet that many would rather get a Tangent Devices one before making the jump on the original, maybe because you can buy a nice computer plus broadcast monitor from the difference
I see where you are getting at, but making a program free and not only for evaluation would always be a pretty dumb decision then. Remember that one aspect of the full DaVinci Software is a Denoiser, which you can easily get into your Lite Version with NEAT (with better results, too). That is a fair amount of "circumventing restrictions"
As mentioned before, it's only really 1½ things that I miss in Fusion. Limit the output to UHD like in DaVinci Lite (yet that would be incredibly easy to circumvent to with stock tools), stuff like that, I don't care. But some things would be nice have, like a Re-Noiser/Re-Grainer.
Also you can restrict which OFX will be loaded to begin with, no? E.g., OpticalFlares won't show up in DaVinci, only in Nuke. Should be possible the other way around too?